Soil fertility evaluation level for establishing a security / crop available forms of power supply components and the need to use fertilizers;

determining agrochemical properties manifested by reacting fertilizer with soil and allow to conclude that the necessary chemical reclamation periods Fertilizer absorbing and buffering capacity of the soil reaction, degree of acidity, degree and nature of salinity, etc .;

change control content in the soil of nutrients and their availability to plants depending on methods of technology use of fertilizers and chemical reclamation facilities;

the study of the interaction of fertilizer with the soil, and to assess the balance of nutrients in agriculture.

How often to do agrochemical soil survey

Chemical processes in the soil are constantly, especially after each agrochemical activities, when the speed and complexity of the chemistry has grown significantly, so agrochemical examination of soil is recommended on all types of agricultural land each year. And, after collecting predshestvennika- full analysis, and in the spring - check. To ensure the quality agrochemical inspection must correctly select the soil sample in the field.

Plant SurveyChemical plant diagnostics - is spent on phases of vegetation analysis indicator organs of plants to establish their provision of micro and macro elements in the formation of the crop. Distinguish tissue and leaf diagnosis. For diagnostic use fresh tissue samples without incineration plants on the content of inorganic compounds form elements. During sheet diagnostics determine the total content of the elements after ashing the samples of leaf or other plant parts.

MethodsThe base sheet diagnosis is to determine the activity of chloroplasts. To the resulting slurry of the average sample power element chloroplasts added at a certain concentration, after which the photochemical activity of the suspension. If the photochemical activity of the chloroplast slurry as compared to control (without addition of elements) is increased conclude lack this element, if reduced - an excess, if the activity is the same - about optimum concentration in the medium. This operation is performed for each battery. In this method in the analysis of plant and determine reaction modeled fertilizer during periods fertilizing crops.

The content of nutrients in plant tissues

It is necessary to determine with greater regularity as compared with the ground - the use of a chemical plant diagnosis data depends efficiency foliar application. Foliar feeding is carried out in several stages during the growing season, they agree with the content of both the batteries in the plant tissues and physiological phases of organogenesis culture. The deficit of the battery can also be influenced by external factors, namely:

freezing of the root system or rodent damage;

low or high soil temperature and air;

damage (winter) low temperatures in winter, is usually caused by the movement limiting nutrients;

deficiency or excess of water in the soil;

the acidity of the soil reaction (pH 4,1-4,5 acidic or alkaline pH ˃7,0);

antagonism of ions in the soil environment.

The presence of at least one of these factors is the basis for an additional plant diagnostics.